WebGPURenderer: Request all supported features.

[Mugen87]

Related issue: #25867

Description

In order to solve the issue outlined in #25867 (comment), WebGPURenderer request all supported features of a device now.

[takahirox]

Nit: If we want to request all supported features, we may make an array from GPUAdapter.features directly.

const supportedFeatures = [];
for (const feature of adapter.features.values()) {
  supportedFeatures.push(feature);
}

Note that GPUAdapter.features is setlike in WebGPU and WebIDL.

https://webidl.spec.whatwg.org/#es-setlike
https://gpuweb.github.io/gpuweb/#gpusupportedfeatures

Pros: We don't need to manage features list for this purpose. Even if new features added in the WebGPU spec, we don't need to update the code.
Cons: If we will want to not support certain features, maybe the current implementation would be simpler?

[Mugen87]

If we will want to not support certain features

That is a good point. I suppose not supporting certain features could become useful so I guess the current approach is more flexible.